I THINK I HAVE SYMTOMS OF PTSD?

I served in Iraq about 5 years ago. I had a really hard time when I was there but alot of it wasn't doented because we were in maneuvers. I seen some things I thought wouldn't affect me but now it seems I was wrong. I been having nightmares and cant sleep at night. Not to mention I have high blood pressure which was doented I before I seperated. Im also having problems showing up in time for work because Im only able to fall asleep an hour or two before I have to go to work. Im constantly checking my home for intruders and cant hold on to relationships. Im having major anger issues on my job. Ive been to the VA but I haven't been evaluated. I separated from the army 4 years ago and since then Ive still been having these problems. I just didn't want to go to the VA because I thought I was ok. But now its getting worse because my jobs really in jeopardy. What should I do?